Studying 2003 Bam Post-Seismic Deformation Field Based on the Persistent Scatterer Radar Interferometry Technique (StaMPS)

Shokrzade, S; Voosoghi, B; Amighpey, M

doi:10.22071/gsj.2015.43414

Studying 2003 Bam Post-Seismic Deformation Field Based on the Persistent Scatterer Radar Interferometry Technique (StaMPS)

Document Type : Original Research Paper

Authors

S Shokrzade ¹

B Voosoghi ²

M Amighpey ³

¹ M. Sc., K.N.Toosi University of Technology, Faculty of Geodesy & Geomatics Eng., Tehran, Iran.

² Associate Professor, K.N.Toosi University of Technology, Faculty of Geodesy & Geomatics Eng., Tehran, Iran.

³ Ph.D., K.N.Toosi University of Technology, Faculty of Geodesy & Geomatics Eng., Tehran, Iran.

10.22071/gsj.2015.43414

Abstract

In this paper, the Bam post-seismic annual deformations in period from 2004 to 2010 have been obtained using synthetic aperture radar interferometry. The time series of deformations have been constructed using Persistent Scatterer Radar Interferometry technique. When displacements rate in the area are low and the pixels are with temporal decorrelation, this technique is more effective. The technique also largely reduces the topography residuals and atmospheric delay. Because of the low rates of post-seismic displacements, this technique is very useful for measuring such earth surface displacements. The results illustrate that the maximum amount of uplift and subsidence displacements for Line Of Sight (LOS) direction during 2004 to 2010 after the earthquake are 4.5± 0.5 and -4.3± 0.5 centimeter, respectively. Comparison of displacement fields demonstrates that the displacements reduction rates are approaching to the co-seismic phase. In addition, the results of post-seismic modeling proves that displacements field, follows exponential or logarithmic function.

Keywords

Radar interferometry

Post-seismic Deformations

Persistent Scatterer Technique

Interferogram

time series